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TiC/metal nacrous structures and their fracture toughness increase

Published online by Cambridge University Press:  31 January 2011

C.H. Liu ,
Wen-Zhi Li  and
Heng-De Li
C.H. Liu
Affiliation:
Department of Physics, Tsinghua University, Beijing 100084, China
Wen-Zhi Li
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Heng-De Li
Affiliation:
Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Abstract

Multilayers of TiC and a series of metals have been fabricated by ion beam sputtering deposition to simulate nacre. The individual layer thickness varies from 1 to 10 nm, and the total thickness of the multilayers is about 1 μm. Transmission electron microscopy (TEM), low-angle x-ray diffraction (LXRD), and high-resolution electron microscopy (HREM) show their periodicity and lattice images. A particular method is devised to evaluate the relative toughness of this artificial pearlite. It is shown that the toughness of these nanocomposite materials can be tremendously improved. A maximum of toughness appears at a certain modulation. Metals with high plasticity such as Al and Cu can produce a particularly spectacular effect on increasing the toughness of these multilayers.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 9 , September 1996 , pp. 2231 - 2235
Copyright
Copyright © Materials Research Society 1996

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References

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